Cooler for sheet-glass apparatus



Feb. 5, 1929.

H. E. ALLEN cooLEE Eon SHEET eLAss APPARATUS Filed Aug. 26. 1926 Patentedv Feb. 5,

ALLEN, or Tornano, c1110,u nssIGNon 'ro'rnn LI'BBnY-ownNs SHEET enass conm, or romano, onro, A oonronarron or omo.

nonnen n COOLER FOR SHEET-GLASS APPARATUS.

.applicants mea'august 2e, ieee.- sm'ai ne. 131,633.

` This invention relates to improvements in sheet lass apparatus, and has more particular reerence to a novel form of cooler for association therewith.

tv An important object of the present invention is .to provide a cooler so constructed that it will have a uniform cooling action `on molten glassfrom which a sheet may be drawn. c J

vision o'such a cooler which will improve Y the smoothness of a glass sheet being drawn, and which will further act as means for bafiiing or cooling heated airv currents escaping V15 from the furnace and heating chamber.

ber '4, 1917 is shown a pair o coolers having lla-t bottoms directly exposed to the molten glass passing thereunder but in spaced relai tion thereto, and these coolers are constructed of thin sheet metal having a' cooling medium 3c circulated therethrough. It has been found that the metal ofwhich these coolers are con` structed Vis wavy, and this wav'iness of the y metal in the bottoms of the coolers creates an uneven cooling or Iheatabsorbing action on'- 'the molten lass passing thereunder, which 1 it is believer? causes a^ corrugated appearance ina sheet drawn from this glass, In order to remove the corrgations in thecooler bottoms, they'were edor planed-ila-t, but this caused some parts of -the metal to be thinner than others, which has the same resultant effeet as the wavy bottom, namely, ununiform yheat absorption. As above stated, the primary purpose of the presentv invention is to 5 construct a cooler which afford a uniform heat absorption. l

In the accompanying drawings forming apart of this apfplication, and wherein like characters of re erence designate corresponding parts throughout fhe-severalviews:

I Fig.1 is a longitudinal vertical sectional view of a portion oisheet drawing apparatus,

showing associated therewith in cross .section alpair of coolers constructed in accordance u the present invention, p

Another object Aof the invention is the pro- Fig. 2 is a transverse vertical section taken ing drawings and especially to Figs. 1 to .3 i

inclusive, `10 generally desi nates a receptacle or draw pot supported a ove the heating chamber .11, and containing the molten glass 12 which is sup lied thereto from the furnace 13.. A sheet ci) glass 14 is drawn from the molten glass 12 in the receptacle by means of the drawing mechanism 15. Positioned at each sideof the sheet 14 and immediately adjacent to the surface of the molten glass l2, are the coolers 16, which serve to' protect the sheet from heated air currents escaping from the furnace and heating chamber, and `at the sanie time aid in absorbing the heat from the glass passing thereunder to give it the proper viscosity to sheet form.

The coolers 16 are identical in construction so that a' detailed description of only one of them is thought to be necessary. The cooler is preferably made of sheet metal and is de-v signed to form a hollow elongated casing, e

Yeater portion of the side walls 17 and 18 belng straight and preferably parallel. The lower portions of the side walls 17 and 18 converge toward one another as indicated at 19 and 20, and 'terminate in a feather edge 21, whichoedge is disposed equi-distant the'side walls 17 and 18. The casing is internally cooled by circula a cooling medium therethrough, such as re ativel coeljjwaten TheA 'coohngmedium enterst e cooler through the pipe 22 extending longitudinally withln the casing, and-passes thereromthrough a` plurality of openings therein into the casing. coo fluid then asses exteriorly of the casingt Arough the pipe 23. 4

In Fi 4, :whereinfhas been shown a somewhat shghtly modified type of cooler, the

permit it to be drawn away in V so side wall 17 extends downwardly beyond the` I `side wall 18,'and these wallsv are connected by "an inclined bottom-l22 which slants downtype ofcooler shownin' Fig. 5 is somewhat slmilar lto thev cooler shown in Fig. 4,- the diierencebein that the side w '18 prol. wardly from the sid 18 tothe side 17 The 6 the side 17 extends downwardly beyond the and the inclined bottom 22 slants downwardly from the side 417 to the side 18. In Fig.

side 18 with the lower enti thereof` slanting inwardly and downwardly as at 24. An inclined bottom 25 isl provided which slants downwardly from the side 18 and is connected with' the slanting portion 24 to define a'feather edge 26. v

In operation, the molten glass flows from the furnace and iills the shallow glass draw- `ing rceptacle or draw pot 10. A relatively terminating at their lower ends in a single,

feather edge or line which extends trans-- small area of the surface glass about the center of the receptacle isl exposed to the atmosphere, and is further uniform] cooled by means ofthe coolers described ereinabove.

It is fromthisuniformly cooled area that a sheet of glass of greater smoothness is` Aversely substantially the entire width of the inolten glass, thus aii'ording a uniform heat absor tion.

'\It 1s to be understood ,that the form of the invention herewith shown and described is to be taken as the preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of' the invention or the scope of the subjoined claims.

Claims:

1. In combination in sheet glass apparatus, a receptacle containing a mass of molten glass, means for drawing a sheet upwardly therefrom, and coolers arranged at opposite sides of said sheet, each cooler comprising an elongated casing extending transversely of the sheetV and havin a pair of side Walls terminating at their Iower end in alfeather edge which is positioned in close proximity to the mass of molten glass.

2. In combination in sheet glass apparatus,

a receptacle containing avmass` of molten glass, means for drawing a sheet upwardly therefrom, and a cooler arranged at one side of said sheet, said cooler comprisin an elongated casing extending transverse y,of the sheet and having a pair ofside walls terminating at their lower end in a feather edge whichA4 is positioned in close proximity to the mass of molten glass. Y

Si ned at Toledo, in the county of-Lucas and tate of Ohio,l this '21st day of August, 1926. e f

A11011141013: E. ALLEN. 

